55166240 has 48 divisors (see below), whose sum is σ = 131149368. Its totient is φ = 21927936.

The previous prime is 55166231. The next prime is 55166263. The reversal of 55166240 is 4266155.

It can be written as a sum of positive squares in 4 ways, for example, as 54582544 + 583696 = 7388^2 + 764^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26684 + ... + 28676.

Almost surely, 2^55166240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55166240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65574684).

55166240 is an abundant number, since it is smaller than the sum of its proper divisors (75983128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55166240 is a wasteful number, since it uses less digits than its factorization.

55166240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55166240 is about 7427.3979292886. The cubic root of 55166240 is about 380.6780139129.

The spelling of 55166240 in words is "fifty-five million, one hundred sixty-six thousand, two hundred forty".